Title:
Open hole carrier
United States Patent 2764938


Inventors:
Traill, Harcus Robert
Application Number:
US11629549A
Publication Date:
10/02/1956
Filing Date:
09/17/1949
Assignee:
Borg, Warner
Primary Class:
Other Classes:
89/1.1
International Classes:
E21B43/117
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US Patent References:
Foreign References:
GB414959A1934-08-16